/Engine/Source/Runtime/Slate/Public/Framework/Docking/LayoutService.h
Write the layout out into a named config file.
static void SaveToConfig ( const [FString](API\Runtime\Core\Containers\FString) & InConfigFileName, const [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< [FTabManager::FLayout](API\Runtime\Slate\Framework\Docking\FTabManager\FLayout) > & InLayoutToSave )